Multi-directional field annealing of a thin-film electromagnetic

Details Multi-directional field annealing of a thin-film electromagnetic Multi-directional field annealing of a thin-film electromagnetic

1983-10-11

1985-10-01

Andrews, Melvyn J.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148108, H01F 4102

Patent

active

045444218

ABSTRACT:
A method of field annealing a thin-film electromagnetic read/write head formed of magnetic-field-responsive material having a known Curie temperature. Such a head also includes an electric coil for operatively exciting the head. The method includes the steps of heating the head to a temperature less than the Curie temperature, and then cooling the head while applying electric current to the coil sufficient to induce magnetic flux in the head. The foregoing steps, properly applied, align the magnetic-field-responsive structure, such as magnetic domains in a soft magnetic material, in the direction of operative flux flow in the head.

REFERENCES:
patent: 3138494 (1964-06-01), Burket et al.
patent: 4236230 (1980-11-01), Thompson
patent: 4414554 (1983-11-01), Springer
patent: 4494125 (1985-01-01), Springer

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